src/hotspot/share/oops/instanceMirrorKlass.inline.hpp
changeset 47216 71c04702a3d5
parent 33611 9abd65805e19
child 48101 02f9be87cf5c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/oops/instanceMirrorKlass.inline.hpp	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,149 @@
+/* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#ifndef SHARE_VM_OOPS_INSTANCEMIRRORKLASS_INLINE_HPP
+#define SHARE_VM_OOPS_INSTANCEMIRRORKLASS_INLINE_HPP
+
+#include "classfile/javaClasses.hpp"
+#include "oops/instanceKlass.inline.hpp"
+#include "oops/instanceMirrorKlass.hpp"
+#include "oops/klass.hpp"
+#include "oops/oop.inline.hpp"
+#include "utilities/debug.hpp"
+#include "utilities/globalDefinitions.hpp"
+#include "utilities/macros.hpp"
+
+template <bool nv, typename T, class OopClosureType>
+void InstanceMirrorKlass::oop_oop_iterate_statics_specialized(oop obj, OopClosureType* closure) {
+  T* p         = (T*)start_of_static_fields(obj);
+  T* const end = p + java_lang_Class::static_oop_field_count(obj);
+
+  for (; p < end; ++p) {
+    Devirtualizer<nv>::do_oop(closure, p);
+  }
+}
+
+template <bool nv, class OopClosureType>
+void InstanceMirrorKlass::oop_oop_iterate_statics(oop obj, OopClosureType* closure) {
+  if (UseCompressedOops) {
+    oop_oop_iterate_statics_specialized<nv, narrowOop>(obj, closure);
+  } else {
+    oop_oop_iterate_statics_specialized<nv, oop>(obj, closure);
+  }
+}
+
+template <bool nv, class OopClosureType>
+void InstanceMirrorKlass::oop_oop_iterate(oop obj, OopClosureType* closure) {
+  InstanceKlass::oop_oop_iterate<nv>(obj, closure);
+
+  if (Devirtualizer<nv>::do_metadata(closure)) {
+    Klass* klass = java_lang_Class::as_Klass(obj);
+    // We'll get NULL for primitive mirrors.
+    if (klass != NULL) {
+      if (klass->is_instance_klass() && InstanceKlass::cast(klass)->is_anonymous()) {
+        // An anonymous class doesn't have its own class loader, so when handling
+        // the java mirror for an anonymous class we need to make sure its class
+        // loader data is claimed, this is done by calling do_cld explicitly.
+        // For non-anonymous classes the call to do_cld is made when the class
+        // loader itself is handled.
+        Devirtualizer<nv>::do_cld(closure, klass->class_loader_data());
+      } else {
+        Devirtualizer<nv>::do_klass(closure, klass);
+      }
+    } else {
+      // If klass is NULL then this a mirror for a primitive type.
+      // We don't have to follow them, since they are handled as strong
+      // roots in Universe::oops_do.
+      assert(java_lang_Class::is_primitive(obj), "Sanity check");
+    }
+  }
+
+  oop_oop_iterate_statics<nv>(obj, closure);
+}
+
+#if INCLUDE_ALL_GCS
+template <bool nv, class OopClosureType>
+void InstanceMirrorKlass::oop_oop_iterate_reverse(oop obj, OopClosureType* closure) {
+  InstanceKlass::oop_oop_iterate_reverse<nv>(obj, closure);
+
+  InstanceMirrorKlass::oop_oop_iterate_statics<nv>(obj, closure);
+}
+#endif
+
+template <bool nv, typename T, class OopClosureType>
+void InstanceMirrorKlass::oop_oop_iterate_statics_specialized_bounded(oop obj,
+                                                                     OopClosureType* closure,
+                                                                     MemRegion mr) {
+  T* p   = (T*)start_of_static_fields(obj);
+  T* end = p + java_lang_Class::static_oop_field_count(obj);
+
+  T* const l   = (T*)mr.start();
+  T* const h   = (T*)mr.end();
+  assert(mask_bits((intptr_t)l, sizeof(T)-1) == 0 &&
+         mask_bits((intptr_t)h, sizeof(T)-1) == 0,
+         "bounded region must be properly aligned");
+
+  if (p < l) {
+    p = l;
+  }
+  if (end > h) {
+    end = h;
+  }
+
+  for (;p < end; ++p) {
+    Devirtualizer<nv>::do_oop(closure, p);
+  }
+}
+
+template <bool nv, class OopClosureType>
+void InstanceMirrorKlass::oop_oop_iterate_statics_bounded(oop obj, OopClosureType* closure, MemRegion mr) {
+  if (UseCompressedOops) {
+    oop_oop_iterate_statics_specialized_bounded<nv, narrowOop>(obj, closure, mr);
+  } else {
+    oop_oop_iterate_statics_specialized_bounded<nv, oop>(obj, closure, mr);
+  }
+}
+
+template <bool nv, class OopClosureType>
+void InstanceMirrorKlass::oop_oop_iterate_bounded(oop obj, OopClosureType* closure, MemRegion mr) {
+  InstanceKlass::oop_oop_iterate_bounded<nv>(obj, closure, mr);
+
+  if (Devirtualizer<nv>::do_metadata(closure)) {
+    if (mr.contains(obj)) {
+      Klass* klass = java_lang_Class::as_Klass(obj);
+      // We'll get NULL for primitive mirrors.
+      if (klass != NULL) {
+        Devirtualizer<nv>::do_klass(closure, klass);
+      }
+    }
+  }
+
+  oop_oop_iterate_statics_bounded<nv>(obj, closure, mr);
+}
+
+#define ALL_INSTANCE_MIRROR_KLASS_OOP_OOP_ITERATE_DEFN(OopClosureType, nv_suffix)  \
+  OOP_OOP_ITERATE_DEFN(          InstanceMirrorKlass, OopClosureType, nv_suffix)   \
+  OOP_OOP_ITERATE_DEFN_BOUNDED(  InstanceMirrorKlass, OopClosureType, nv_suffix)   \
+  OOP_OOP_ITERATE_DEFN_BACKWARDS(InstanceMirrorKlass, OopClosureType, nv_suffix)
+
+#endif // SHARE_VM_OOPS_INSTANCEMIRRORKLASS_INLINE_HPP